Rocket science, explained with soda bottles

Fuel and oxidizer. Together they make propellant, which can be used to launch a rocket – but for the best results, you need to find the right ratio. Too much of one or the other, and your exhaust velocity begins to drop. Less exhaust velocity means less thrust — and less thrust means you will not go to space today. » 4/11/13 4:20pm 4/11/13 4:20pm

Watching a face waggle at 1,000 fps is weirdly hypnotic

Staring at this flexcam footage of a man whipping his face-flesh to-and-fro, his lips projected outward in what might be the best impersonation of a lolface ever commited to video, I can't help but recall something evolutionary biologist Christopher Schneider told us in an interview last month — that the most recent… » 12/21/12 3:20pm 12/21/12 3:20pm

Get More Classic British SF In HD Starting Next Month

BBC America is launching its HD channel with a week of science fiction, starting July 20. They'll be premiering the Easter Doctor Who special, "Planet Of The Dead" — which happens to be the first Who shot in HD — and running the new Torchwood miniseries "Children Of Earth." On July 20, a Torchwood behind-the-scenes special … » 6/01/09 12:25pm 6/01/09 12:25pm